MFJ-2389
Adjustment Element
7MHz
Mast Clamps
Washers (S)
Bolts
Allen
Compact 8 Band Vertical
The MFJ-2389 is an 8 band compact vertical
that is designed to operate on 80, 40, 20, 15, 10,
6, 2M, and 70CM bands. The antenna will
handle 200W PEP or 50W CW HF or 150W
CW/FM VHF and UHF. Due to the compact
design the antenna it requires the use of an
antenna tuner to cover the bands completely.
NOTE
RADIATING ELEMENTS
When assembling and installing the antenna use
caution to avoid mounting the antenna near
power lines.
Assemble the antenna on the ground first if
possible to make it easier to assemble.
Eye protection is strongly recommended. The
elements can be an eye hazard when
assembling and installing. Mount the antenna
out of normal reach and pedestrian traffic.
When mounting the antenna in high places get
assistance. The antenna is not heavy but is
awkward when assembled. Some one to assist
you may help prevent injuries.
Tools Required
7mm, 8mm, and 10mm open end wrench or
Adjustable wrench
PARTS DESCRIPTION
Main Body
3.5MHz
Radial
21MHz
Radiator
21MHZ Radiator
14MHz
Radiator
7MHz
Radiator
29MHz Radiator
3.5MHz
Radiator
Adjustment Element
RADIAL ELEMENTS
Radial
14MHz
Radial
21MHz
Radial
28MHz
Radial
28MHz
Radiator
50MHz
Radial
V Clamps
Wrench
Mast Pipe
Nuts
Washers(L)
Assembly Instructions
1. Mount the Mast Clamps and the Mast
Pipe to the mast. For tuning and testing
this can be a temporary mount. Make
sure the Mast Pipe and the Mast is
parallel to each other
so that antenna does
not tilt to one side
throwing off the mast
balance. The mast
diameter should be
1.125 to 1.5 inches.
3. Assemble each Radiator Element to the
Main Body. Attach the 3.5MHz element
to the top and the other radiators to the
top mounting ring.
3.5MHz
Element
2. Adjust the radials to the Standard
Length shown in the chart and then
tighten them down with the Allen
Wrench.
Standard
Length
Each element is labeled with the frequency band
and the Radial Elements have a larger size
mounting screw than the Radiator Elements.
STANDARD LENGTH Table
BAND Radiator Radial
3.5 MHz 25.9” (660mm) 20.7” (525mm)
7 MHz 11.4” (290mm) 13.2” (335mm)
14 MHz 11.4” (290mm) 12.0” (305mm)
21 MHz 6.1” (155mm) 20.7” (525mm)
28 MHz 2.6” (65mm) 21.7” (550mm)
50 MHz none 28.1” (715mm)
21 MHz Adj.
Element
29 MHz Adj.
Element
The 21 MHz Radiator Adjustment Element is
used when operation on at the top end of the 21
MHz band is desired in place of the 21 MHz
Element.
The 29 MHz Radiator Adjustment Element is
used when operation on 29 MHz FM is desired
in place of the 28 MHz Element.
10” (255mm)
14.2” (360mm)
7MHz
Element
14MHz
Element
28MHz
Element
Mast Body
4. It is recommended to make an RF
isolating section by placing several
clamp-on ferrite chokes such as the
MFJ-700 series to fit your cable. Tape
the chokes to the cable below the RF
connector so they do not slide down the
cable. A jumper made up with several
ferrite beads and the proper connectors
and adapters can also be made up and
used.
5. Pull the cable and chokes up through
the mast tube and attach the RF
21MHZ
Element
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